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Restructuring (Summary of Restructuring Activity) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Nov. 30, 2016
Restructuring Reserve [Roll Forward]      
Beginning Balance $ 4,126 $ 1,550 $ 3,361
Costs incurred   22,210 1,692
Cash disbursements (6,111) (19,234) (3,539)
Translation adjustments and other 45 362 36
Asset impairment   (762)  
Ending Balance 311 4,126 1,550
Excess Facilities and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning Balance 570 107 412
Costs incurred 1,011 2,655 319
Cash disbursements (1,309) (1,456) (633)
Translation adjustments and other 35 26 9
Asset impairment   (762)  
Ending Balance 307 570 107
Employee Severance and Related Benefits      
Restructuring Reserve [Roll Forward]      
Beginning Balance 3,556 1,443 2,949
Costs incurred 1,240 19,555 1,373
Cash disbursements (4,802) (17,778) (2,906)
Translation adjustments and other 10 336 27
Asset impairment   0  
Ending Balance 4 3,556 1,443
2017 Restructuring Activities      
Restructuring Reserve [Roll Forward]      
Beginning Balance 4,096 0  
Costs incurred 2,251 22,125  
Cash disbursements (6,081) (17,629)  
Translation adjustments and other 45 362  
Asset impairment   (762)  
Ending Balance 311 4,096 0
2017 Restructuring Activities | Excess Facilities and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning Balance 540 0  
Costs incurred 1,011 2,570  
Cash disbursements (1,279) (1,294)  
Translation adjustments and other 35 26  
Asset impairment   (762)  
Ending Balance 307 540 0
2017 Restructuring Activities | Employee Severance and Related Benefits      
Restructuring Reserve [Roll Forward]      
Beginning Balance 3,556 0  
Costs incurred 1,240 19,555  
Cash disbursements (4,802) (16,335)  
Translation adjustments and other 10 336  
Asset impairment   0  
Ending Balance 4 3,556 0
2016 Restructuring Activities      
Restructuring Reserve [Roll Forward]      
Beginning Balance 0 1,415 0
Costs incurred   1,500 1,482
Cash disbursements   (1,415) (67)
Ending Balance   0 1,415
2016 Restructuring Activities | Excess Facilities and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning Balance 0 0 0
Costs incurred     0
Cash disbursements   0 0
Ending Balance   0 0
2016 Restructuring Activities | Employee Severance and Related Benefits      
Restructuring Reserve [Roll Forward]      
Beginning Balance 0 1,415 0
Costs incurred     1,482
Cash disbursements   (1,415) (67)
Ending Balance   0 1,415
2012 - 2015 Restructuring Activities      
Restructuring Reserve [Roll Forward]      
Beginning Balance 30 135 3,361
Costs incurred   85 210
Cash disbursements (30) (190) (3,472)
Translation adjustments and other     36
Ending Balance 0 30 135
2012 - 2015 Restructuring Activities | Excess Facilities and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning Balance 30 107 412
Costs incurred   85 319
Cash disbursements (30) (162) (633)
Translation adjustments and other     9
Ending Balance 0 30 107
2012 - 2015 Restructuring Activities | Employee Severance and Related Benefits      
Restructuring Reserve [Roll Forward]      
Beginning Balance 0 28 2,949
Costs incurred   0 (109)
Cash disbursements 0 (28) (2,839)
Translation adjustments and other     27
Ending Balance $ 0 $ 0 $ 28